ALSA: core: Add snd_card_free_on_error() helper
This is a small helper function to handle the error path more easily when an error happens during the probe for the device with the device-managed card. Since devres releases in the reverser order of the creations, usually snd_card_free() gets called at the last in the probe error path unless it already reached snd_card_register() calls. Due to this nature, when a driver expects the resource releases in card->private_free, this might be called too lately. As a workaround, one should call the probe like: static int __some_probe(...) { // do real probe.... } static int some_probe(...) { return snd_card_free_on_error(dev, __some_probe(dev, ...)); } so that the snd_card_free() is called explicitly at the beginning of the error path from the probe. This function will be used in the upcoming fixes to address the regressions by devres usages. Fixes: e8ad415b ("ALSA: core: Add managed card creation") Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20220412093141.8008-2-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>
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